一种电压控制CMOS电调谐第二代电流传输器(ECCⅡ)  

A Voltage-Controlled CMOS Electronically Tunable Second Generation Current Conveyor(ECCⅡ)

作　　者：李沁莲[1] 陈向东[1] 王丽娜[1] 梁建[1] 

机构地区：[1]西南交通大学信息科学与技术学院,四川成都610031

出　　处：《微电子学与计算机》2011年第6期62-66,共5页Microelectronics & Computer

摘　　要：提出了一种电压跟随能力强、功耗低、调节范围大的CMOS电调谐第二代电流传输器(ECCⅡ),通过引入对称的CMOS电流舵电路,保证了电流传输精度,电流增益连续可调,调节因子-2≤K≤2,同时避免了电流镜的过多使用,减小了电流损耗.采用电压调控方式,增大了电流输入范围;将电流输入端和电流加减电路隔离,保证了精确的电压跟随能力.采用TSMC 0.35μm工艺参数,在±1.5V电源供电的条件下对电路进行了Hspice模拟,VY/VX,和IZ/IX的-3 dB带宽分别为83.5 MHz和136 MHz,功耗为1.7515 mW.该电路在可调谐连续时间电流模式滤波器的设计中有广泛的应用前景.A Voltage-Controlled double output CMOS electronically tunable second generation current conveyor（ECCⅡ） with strong voltage following ability、high precision and low power dissipation was presented.The introduction of the balanced configuration of differential pairs used as current steering elements insure the current transfer accuracy and also make the current gain of the proposed ECCⅡ-can be controlled electronically by adjusting the gain control voltage of the ECCII with a current gain between-2 and 2;the using of the current steering elements also reduces the current consumption by avoiding excessive use of current mirror;the voltage control mode increases the current input range;the isolation of current input terminal from current plus/minus circuits ensure accurate voltage following ability.Using CSMC 0.35μm CMOS process model,the HSPICE simulation results show that V_X/ V_Y and I_Z/I_X have-3 dB bandwidth of 83.5 MHz and 136 MHz for the proposed ECCⅡ respectively,the proposed circuit power consumption is 1.751 5 mW.The ECCII has comprehensive applications in the tunable current mode continuous time filters.

关 键 词：电流舵 CMOS电谐调第二代电流传输器(ECCⅡ) 电流模式滤波器 

分 类 号：TN432[电子电信—微电子学与固体电子学] TN722.5